testing with --rm and docker run (#1240)
testing with --rm and docker run (#1240)

Add --rm to docker run for Jenkins tests.
ray-project/ray,ray-project/ray,stephanie-wang/ray,stephanie-wang/ray,robertnishihara/ray,pcmoritz/ray-1,richardliaw/ray,robertnishihara/ray,robertnishihara/ray,richardliaw/ray,ujvl/ray-ng,stephanie-wang/ray,richardliaw/ray,atumanov/ray,atumanov/ray,ray-project/ray,atumanov/ray,ray-project/ray,stephanie-wang/ray,stephanie-wang/ray,atumanov/ray,richardliaw/ray,pcmoritz/ray-1,ujvl/ray-ng,richardliaw/ray,pcmoritz/ray-1,robertnishihara/ray,robertnishihara/ray,stephanie-wang/ray,pcmoritz/ray-1,richardliaw/ray,ray-project/ray,pcmoritz/ray-1,robertnishihara/ray,ray-project/ray,ujvl/ray-ng,richardliaw/ray,pcmoritz/ray-1,robertnishihara/ray,robertnishihara/ray,robertnishihara/ray,richardliaw/ray,atumanov/ray,atumanov/ray,atumanov/ray,stephanie-wang/ray,pcmoritz/ray-1,pcmoritz/ray-1,stephanie-wang/ray,ray-project/ray,ray-project/ray,ujvl/ray-ng,stephanie-wang/ray,atumanov/ray